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[48/93] netfilter: nf_conntrack: restrict runtime expect hashsize modifications

From:  Greg KH <gregkh-AT-suse.de>
To:  linux-kernel-AT-vger.kernel.org, stable-AT-kernel.org
Subject:  [48/93] netfilter: nf_conntrack: restrict runtime expect hashsize modifications
Date:  Fri, 19 Feb 2010 08:29:41 -0800
Cc:  stable-review-AT-kernel.org, torvalds-AT-linux-foundation.org, akpm-AT-linux-foundation.org, alan-AT-lxorguk.ukuu.org.uk, Alexey Dobriyan <adobriyan-AT-gmail.com>, Patrick McHardy <kaber-AT-trash.net>
Archive-link:  Article, Thread

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Alexey Dobriyan <adobriyan@gmail.com>

commit 13ccdfc2af03e09e60791f7d4bc4ccf53398af7c upstream.

Expectation hashtable size was simply glued to a variable with no code
to rehash expectations, so it was a bug to allow writing to it.
Make "expect_hashsize" readonly.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 net/netfilter/nf_conntrack_expect.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/netfilter/nf_conntrack_expect.c
+++ b/net/netfilter/nf_conntrack_expect.c
@@ -569,7 +569,7 @@ static void exp_proc_remove(struct net *
 #endif /* CONFIG_PROC_FS */
 }
 
-module_param_named(expect_hashsize, nf_ct_expect_hsize, uint, 0600);
+module_param_named(expect_hashsize, nf_ct_expect_hsize, uint, 0400);
 
 int nf_conntrack_expect_init(struct net *net)
 {




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